<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<input type="text" placeholder="请输入1-100之间的整数">
<input type="button" value="猜一猜" onclick="f()">
<h1>结果：<span></span></h1>
<script>
  let x = parseInt(Math.random()*100)+1;
  let i = document.querySelector("input");
  let s = document.querySelector("span");
  let count = 0;
  function f(){
    if(isNaN(i.value)){
      s.innerText="输入有误"
      return;
    }else {
      count++;
      if (i.value > x) {
        s.innerText = "猜大了";
      } else if (i.value < x) {
        s.innerText = "猜小了";
      }else {
        s.innerText = "恭喜你，猜对了，猜了"+count+"次";
      }
    }
  }
</script>
</body>
</html>